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ie: Add BSS Load parser

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This commit is contained in:
Denis Kenzior 2015-06-10 10:39:33 -05:00
parent 47508db472
commit baa97b13e9
2 changed files with 50 additions and 0 deletions
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42
src/ie.c
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@ -1126,3 +1126,45 @@ bool ie_build_wpa(const struct ie_rsn_info *info, uint8_t *to)
return true;
}
int ie_parse_bss_load(struct ie_tlv_iter *iter, uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity)
{
const uint8_t *data;
if (ie_tlv_iter_get_length(iter) != 5)
return -EINVAL;
data = ie_tlv_iter_get_data(iter);
if (out_sta_count)
*out_sta_count = data[0] | data[1] << 8;
if (out_channel_utilization)
*out_channel_utilization = data[2];
if (out_admission_capacity)
*out_admission_capacity = data[3] | data[4] << 8;
return 0;
}
int ie_parse_bss_load_from_data(const uint8_t *data, uint8_t len,
uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity)
{
struct ie_tlv_iter iter;
ie_tlv_iter_init(&iter, data, len);
if (!ie_tlv_iter_next(&iter))
return -EMSGSIZE;
if (ie_tlv_iter_get_tag(&iter) != IE_TYPE_BSS_LOAD)
return -EPROTOTYPE;
return ie_parse_bss_load(&iter, out_sta_count,
out_channel_utilization, out_admission_capacity);
}

8
src/ie.h
View File

@ -271,3 +271,11 @@ int ie_parse_wpa_from_data(const uint8_t *data, size_t len,
struct ie_rsn_info *info);
bool is_ie_wpa_ie(const uint8_t *data, uint8_t len);
bool ie_build_wpa(const struct ie_rsn_info *info, uint8_t *to);
int ie_parse_bss_load(struct ie_tlv_iter *iter, uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity);
int ie_parse_bss_load_from_data(const uint8_t *data, uint8_t len,
uint16_t *out_sta_count,
uint8_t *out_channel_utilization,
uint16_t *out_admission_capacity);